prHD 604-S2

0,6/1,0 kV power cables with special fire performance for use in power stations and similar installations

1.1 General This document applies to rigid and flexible conductor cables for fixed installations having a rated voltage Uo/U of 0,6/1,0 kV. The insulation and sheaths are either thermoplastic or thermosetting, halogenated or halogen free. The cables are mainly intended for use in power generating plants, sub-stations and other sensitive environments. All cables have specific fire performance requirements. Cables designed to be installed within the containment area of nuclear power plants (LOCA cables), or cables specifically designed to be radiation resistant are not included in this document. Control cables having a minimum conductor size of 1 mm2 up to 61 cores are included in addition to the range of power supply cables. This section specifies the general requirements applicable to these cables; additional or deviating requirements are given in the particular sections of this document. Test methods are specified in EN 50525 series, EN 60811 series, EN 60228, EN 60332-1, HD 605 and IEC 60096-1. The particular types of cables are specified in Parts 3, 4 and 5. 1.2 Object The objects of this document are: - to standardize cables that are safe and reliable when properly used, in relation to the technical; - to state the characteristics and manufacturing requirements directly or indirectly bearing on safety.

Elektroenergetski kabli za napetost 0,6/1,0 kV s posebnimi ognjevzdržnimi lastnostmi za uporabo v elektrarnah in podobnih inštalacijah

General Information

• Status: Not Published
• Publication Date: 02-Jul-2023
• ICS: 13.220.40 - Ignitability and burning behaviour of materials and products
• ICS: 29.060.20 - Cables
• Technical Committee: CLC/TC 20 - Electric cables
• Drafting Committee: CLC/TC 20 - Electric cables
• Current Stage: 4060 - Enquiry results established and sent to TC, SR, BTTF - Enquiry
• Start Date: 09-Jul-2021
• Due Date: 29-Jun-2021
• Completion Date: 09-Jul-2021
• Directive: 2014/35/EU - Directive 2014/35/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of electrical equipment designed for use within certain voltage limits
• Mandate: M/511 - Mandate to CEN, CENELEC and ETSI relating to harmonised standards in the field of the Low Voltage Directive
• Ref Project: oSIST prHD 604-S2:2021 - 0,6/1,0 kV power cables with special fire performance for use in power stations and similar installations

Relations

• Revises: HD 604 S1:1994/A3:2005 - 0,6/1 kV and 1,9/3,3 kV power cables with special fire performance for use in power stations
• Effective Date: 25-Jan-2023
• Revises: HD 604 S1:1994/A2:2002 - 0,6/1 kV and 1,9/3,3 kV power cables with special fire performance for use in power stations
• Effective Date: 24-Sep-2019
• Revises: HD 604 S1:1994/A1:1997 - 0,6/1 kV and 1,9/3,3 kV power cables with special fire performance for use in power stations
• Effective Date: 24-Sep-2019
• Revises: HD 604 S1:1994 - 0,6/1 kV and 1,9/3,3 kV power cables with special fire performance for use in power stations
• Effective Date: 24-Sep-2019

Overview

The prHD 604-S2 standard, developed by CLC, specifies the requirements for 0.6/1.0 kV power cables with special fire performance intended for use primarily in power stations, substations, and similar sensitive installations. This document focuses on both rigid and flexible conductor cables suitable for fixed installations at a rated voltage Uo/U of 0.6/1.0 kV. It incorporates cables with insulation and sheaths made from thermoplastic or thermosetting materials, halogenated or halogen-free, emphasizing their fire performance characteristics.

Excluding cables designed for nuclear power plant containment (LOCA cables) or those with radiation-resistant properties, this standard covers power supply cables and control cables with conductor sizes starting from 1 mm² up to 61 cores. The document outlines general requirements that ensure safety and reliability, supported by harmonized testing methods as defined in relevant EN and IEC standards.

Key Topics

• Scope and Application
  The standard applies to both power and control cables used in power generation and similar sensitive environments requiring enhanced fire safety measures.

• Fire Performance
  All cables under this standard are subject to specific fire performance criteria to enhance safety in critical installations, reflecting their ability to resist ignition, limit flame spread, and reduce smoke and toxic emissions.

• Material Specifications
  Cables are constructed from a range of materials, including:

  • Thermoplastic and thermosetting insulating compounds
  • Halogenated and halogen-free sheathing materials
  • Copper and aluminum conductors, with precise construction and electrical resistance parameters

• Marking and Identification
  The standard mandates clear and durable marking for origin, type identification, and compliance, including core identification aligned with HD 308 S2.

• Testing Methods
  Compliance is verified through harmonized testing procedures referenced from standards such as:

  • EN 50525 series - cable construction and testing
  • EN 60811 series - test methods for cables
  • EN 60332-1 - flame propagation tests
  • HD 605, IEC 60096-1 standards

• Regulatory Alignment
  The document includes provisions addressing the Construction Products Regulation (CPR) and conforms with the Low Voltage Directive (LVD 2014/35/EU), ensuring consistent legal and safety compliance across Europe.

Applications

Cables conforming to prHD 604-S2 are designed for fixed installations in power stations, substations, and other sensitive environments where fire safety is paramount. Specific practical uses include:

• Distribution and control circuits within power generating plants
• Electrical installations requiring enhanced fire resistance to prevent catastrophic failures
• Environments demanding halogen-free options to minimize toxic emissions during fires
• Applications needing reliable current carrying capacity and mechanical robustness under emergency fire conditions

These cables support critical infrastructure safety by delivering:

• Improved fire resistance and safety performance in electric installations
• Compliance with stringent European fire safety and electrical regulations
• Reduced hazard levels through minimized smoke generation and toxic fumes during fire incidents

Related Standards

The prHD 604-S2 standard coordinates closely with several important European and international standards to ensure comprehensive quality and safety coverage:

• EN 50525 series - General requirements and tests for electric cables
• EN 60811 series - Methods to test insulation and jacketing materials
• EN 60332 series - Electricity cables burning tests, including flame retardancy
• HD 308 S2 - Identification of cores in cables and flexible cords
• EN 13501-6 - Fire classification of construction products, applicable to cables
• HD 605 - Additional test methods for electric cables
• IEC 60096-1 - Standardization relating to cable dimensions

Together, these standards provide a framework ensuring that cables meeting prHD 604-S2 demonstrate reliable fire performance and electrical safety suitable for demanding industrial applications.

---

By adhering to the prHD 604-S2 requirements, manufacturers and installers can guarantee cables that support the safety and operational reliability of power generation and industrial facilities, ensuring compliance with evolving fire safety legislation and technical best practices.

Standards Content (Sample)

SLOVENSKI STANDARD
01-junij-2021
Elektroenergetski kabli za napetost 0,6/1,0 kV s posebnimi ognjevzdržnimi
lastnostmi za uporabo v elektrarnah in podobnih inštalacijah
0,6/1,0 kV power cables with special fire performance for use in power stations and
similar installations
Ta slovenski standard je istoveten z: prHD 604-S2
ICS:
13.220.40 Sposobnost vžiga in Ignitability and burning
obnašanje materialov in behaviour of materials and
proizvodov pri gorenju products
29.060.20 Kabli Cables
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

HARMONIZATION DOCUMENT DRAFT
DOCUMENT D'HARMONISATION
HARMONISIERUNGSDOKUMENT
April 2021
ICS  Will supersede HD 604 S1:1994 and all of its
amendments and corrigenda (if any)
English Version
0,6/1,0 kV power cables with special fire performance for use in
power stations and similar installations
To be completed To be completed
This draft Harmonization Document is submitted to CENELEC members for enquiry.
Deadline for CENELEC: 2021-07-09.

It has been drawn up by CLC/TC 20.

If this draft becomes a Harmonization Document, CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations
which stipulate the conditions for implementation of this Harmonization Document on a national level.

This draft Harmonization Document was established by CENELEC in three official versions (English, French, German).

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.

Warning : This document is not a Harmonization Document. It is distributed for review and comments. It is subject to change without notice
and shall not be referred to as a Harmonized Document.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2021 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Project: 70519 Ref. No. prHD 604-S2 E

prHD 604 S2:2021 (E)
Part 1
1 0,6/1 kV power cables with special fire performance
2 PART 0: Contents of HD 604 S2
3 PART 1: GENERAL REQUIREMENTS
prHD 604 S2:2021 (E)
Part 1
4 Contents
5 European foreword . 4
6 Introduction . 5
7 1 Scope . 8
8 1.1 General . 8
9 1.2 Object . 8
10 2 Normative references . 8
11 3 Terms and definitions . 9
12 4 Marking . 11
13 4.1 Indication of origin. 11
14 4.1.1 General . 11
15 4.1.2 Continuity of marks . 11
16 4.2 Additional marking . 11
17 4.3 Durability . 12
18 4.4 Legibility . 12
19 4.5 Common marking . 12
20 4.6 Use of the name CENELEC . 12
21 5 Core identification . 12
22 6 General requirements for the construction of cables . 12
23 6.1 Conductors . 12
24 6.1.1 Material . 12
25 6.1.2 Construction . 12
26 6.1.3 Check of construction . 12
27 6.1.4 Electrical resistance . 13
28 6.1.5 Separator layer . 13
29 6.2 Insulation . 13
30 6.2.1 Material . 13
31 6.2.2 Application . 13
32 6.2.3 Thickness. 13
33 6.3 Assembly of cores . 13
34 6.4 Fillers and tapes . 13
35 6.4.1 General . 13
36 6.4.2 Material . 14
37 6.4.3 Application . 14
38 6.5 Inner covering (bedding) . 14
39 6.5.1 General . 14
40 6.5.2 Material . 14
41 6.5.3 Application . 14
42 6.5.4 Thickness. 14
43 6.6 Inner sheath. 14
44 6.6.1 General . 14
45 6.6.2 Material . 14
46 6.6.3 Application . 15
47 6.6.4 Thickness. 15
prHD 604 S2:2021 (E)
Part 1
48 6.7 Metallic coverings . 15
49 6.7.1 Type of metallic layers . 15
50 6.7.2 Application . 15
51 6.8 Oversheath . 15
52 6.8.1 Material . 15
53 6.8.2 Application . 15
54 6.8.3 Thickness. 15
55 6.9 Non-metallic components of halogen free cables . 16
56 7 Tests on complete cables . 16
57 8 Sealing and packing . 16
58 9 Current carrying capacity . 16
59 10 Guide to use and selection of cables . 16
60 11 Construction Products Regulation (CPR) . 16
61 12 Low Voltage Directive (LVD) . 17
62 13 Requirements of insulating and sheathing compounds . 17
63 Annex A (informative) Guide to use and selection of cables . 42
64 Annex ZZ (informative) Relationship between this European standard and the safety objectives of Directive
65 2014/35/EU [2014 OJ L96] aimed to be covered . 52
66 Bibliography . 54
prHD 604 S2:2021 (E)
Part 1
68 European foreword
69 This document (prHD 604 S2:2021) has been prepared by CLC/TC 20 “Electric cables”.
70 This document is currently submitted to the Enquiry.
71 The following dates are proposed:
• latest date by which the existence of this (doa) dor + 6 months
document has to be announced at national
level
• latest date by which this document has to be (dop) dor + 12 months
implemented at national level by publication of
an identical national standard or by
endorsement
• latest date by which the national standards (dow) dor + 36 months
conflicting with this document have to be (to be confirmed or
withdrawn modified when voting)
72 This document will supersede HD 604 S1:1994 and all of its amendments and corrigenda (if any).
73 This document has been prepared under a mandate given to CENELEC by the European Commission and
74 the European Free Trade Association, and supports essential requirements of EU Directive(s).
75 For the relationship with EU Directive(s) see informative Annex ZZ, which is an integral part of this
76 document.
prHD 604 S2:2021 (E)
Part 1
77 Introduction
78 — Correspondence between material types and the new material designations in prHD 604 S2.
1. Thermoplastic Insulating  Table in prHD 604 S2 Part 1
a. Polyvinylchloride (PVC) Table 2 (TIV)
b. Thermoplastic non-halogenated compound  Table 3 (TIZ)
2. Cross-linked Insulating
a. Cross-linked polyethylene (XLPE) Table 4 (XIP)
b. Ethylene propylene rubber (EPR) Table 5 (XIE)
c. Hard ethylene propylene rubber (HEPR) Table 6 (XIH)
d. Silicone rubber  Table 7 (XIQ)
e. Cross-linked non-halogenated compound  Table 8 (XIZ)
3. Thermoplastic Sheathing
a. Polyvinylchloride (PVC) Table 9 (TMV)
b. Thermoplastic non-halogenated compound  Table 10 (TMZ)
4. Cross-linked Sheathing
a. Cross-linked non-halogenated compound  Table 11 (XMZ)
79 — Correspondence between designation of material types in HD 604 S1/A3 and the new proposed
80 material types in prHD 604 S2.
Part HD 604 prHD 604 HD 604 S1:1994 + prHD 604 Comment
S1:1994 + S2:2021 A1:1997 + A2:2002 S2:2021
A1:1997 + Insulation + A3:2005
NEW Sheath
A2:2002 + material Sheathing
material type
A3:2005 type compound type
Insulation
compound
type
3-A TI 1 TIV 1 TM 1 TMV 1
3-B “PVC insulation” (N/A) “PVC inner sheath & (N/A) No change
oversheath”
3-C R2 TIV 2 Rz TMV 2
3-D DIV 11 TIV 3 DMV 19 TMV 3
3-E TI1 (N/A) TM1 (N/A) Indicated for
withdrawal
3-F (see part 3A) TIV 1 (see part 3A) TMV 1 3-F refers to 3-A
4-A “XLPE XIP 1 TM 1 TMV 4
insulation”
4-B “EPR or EPDM” (N/A) “Chlorosulphonated (N/A) No change
Polyethylene”
4-C G7 XIH 1 Rz TMV 2
4-D XLPE XIP 2 PVC ST TMV 5
prHD 604 S2:2021 (E)
Part 1
4-E TI 1 (N/A) TM 1 (N/A) Indicated for
withdrawal
4-F (see part 4A) XIP 1 (see part 4A) TMV 4 4-F refers to 4-A
4-G DIX 1 {HD 603} XIP 3 DMV 2 {HD 603) TMV 6
5-A XLPE / “other (N/A) “non-halogenated” (N/A) No change
material” non- “XL” or “TP”
halogenated
5-B G10 XIQ 1 M1 TMZ 1
M2 XMZ 1
5-C XLPE XIP 2 ZH1/ST TMZ 2
5-D “halogen-free TIZ 1 “halogen-free TMZ 3 Indicated
ethylene ethylene copolymer introduction of
copolymer flame flame retardant” different material
retardant”
insulation
5-E XLPE or HEPR (N/A) ZM1 or ZM2 (N/A) Indicated for
withdrawal
5-F XLPE XIP 1 “HFFR-sheath” TMZ 4
Q (silicone XIQ 2
rubber)
5-G 2XI1 XIP 4 HM4 TMZ 5
5-H HIC XIZ 1 HMC XMZ 2
HIT1 TIZ 2 HMT1 TMZ 6
HIT2 TIZ 3 HMT2 TMZ 7
5-I XLPE XIP 5 “halogen free TMZ 8
thermoplastic
polymer compound”
5-J (see part 5F) XIP 1 (see part 5F) TMZ 4 5-J refers to 5-F
XIQ 2
5-K IHN 1 (XL) XIZ 2 MHN 1 (XL) XMZ 3
IHN 2 (TP) TIZ 4 MHN 2 (TP) TMZ 9
5-L DIX 1 {HD 603} XIP 3 type G TMZ 10
BE IG TIZ 5
(N/A) not applicable – particular part has been indicated for withdrawal.
81 HD 604 S1 was first published in 1996 and the most recent amendment (A3) was made in 2005. Some
82 sections have remained unchanged since the first publication. Due to amendments of other sections, various
83 changes in styles and formats have been introduced to the particular sections. The aim for this maintenance
84 cycle is to provide a full revision (S2) including the following changes:
85 — Modification of the title, to include some more fields of application apart from power stations.
86 — Collecting the material types in to the common part along with tables detailing the mechanical, physical
87 and electrical requirements.
88 — Addition of a guide to use as an Annex A in Part 1. This can be easily reference from the individual
89 sections.
90 — Addition of Annex ZZ (Low Voltage Directive), showing the references between the legal requirements
91 on electric safety in the Directive and the relevant clauses of this document.
prHD 604 S2:2021 (E)
Part 1
92 — Review of the format of particular sections to bring them to the same style.
PART 1 General requirements
PART 3 Single core and multicore PVC insulated and sheathed cables
3-A no change and no document
3-B withdraw
3-C withdraw
3-D to be withdrawn
3-E withdraw
3-F withdraw
PART 4 Single core and multicore XLPE or EPR insulated, PVC sheathed cables
4-A no change and no document
4-B withdraw
4-C withdraw
4-D Cables with copper and aluminium conductors; unarmoured, armoured or double-screened
4-E withdraw
4-F withdraw
4-G Cables with copper conductors, unarmored or armored
PART 5 Single core and multicore halogen free cables
5-A no change and no document
5-B Unarmoured cables with copper conductors
5-C Cables with copper or aluminium conductors: unarmoured, armoured or double screened
5-D withdrawn: should be new section in HD 603 or HD 604
5-E withdraw
5-F to be withdrawn
5-G Cables with copper conductors and optional copper concentric conductor
5-H Cables with copper conductors, with and without concentric copper conductors, and with
optional armouring
5-I One to four core cables having aluminium or copper conductors
5-J withdraw
5-K Cables with copper or aluminium conductors and with or without concentric copper conductor
or screen
5-L Cables with copper conductors; unarmoured or armoured
prHD 604 S2:2021 (E)
Part 1
93 1 Scope
94 1.1 General
95 This document applies to rigid and flexible conductor cables for fixed installations having a rated voltage
96 U /U of 0,6/1,0 kV. The insulation and sheaths are either thermoplastic or thermosetting, halogenated or
o
97 halogen free. The cables are mainly intended for use in power generating plants, sub-stations and other
98 sensitive environments. All cables have specific fire performance requirements. Cables designed to be
99 installed within the containment area of nuclear power plants (LOCA cables), or cables specifically designed
100 to be radiation resistant are not included in this document.
101 Control cables having a minimum conductor size of 1 mm up to 61 cores are included in addition to the
102 range of power supply cables.
103 This section specifies the general requirements applicable to these cables; additional or deviating
104 requirements are given in the particular sections of this document.
105 Test methods are specified in EN 50525 series, EN 60811 series, EN 60228, EN 60332-1, HD 605 and
106 IEC 60096-1.
107 The particular types of cables are specified in Parts 3, 4 and 5.
108 1.2 Object
109 The objects of this document are:
110 — to standardize cables that are safe and reliable when properly used, in relation to the technical;
111 — to state the characteristics and manufacturing requirements directly or indirectly bearing on safety.
112 2 Normative references
113 The following documents are referred to in the text in such a way that some or all of their content constitutes
114 requirements of this document. For dated references, only the edition cited applies. For undated references,
115 the latest edition of the referenced document (including any amendments) applies.
116 HD 308 S2, Identification of cores in cables and flexible cords
117 HD 605 S3:2019, Electric cables - Additional test methods
118 EN 13501-6, Fire classification of construction products and building elements - Part 6: Classification using
119 data from reaction to fire tests on power, control and communication cables
120 EN 50334, Marking by inscription for the identification of cores of electric cables
121 EN 50395, Electrical test methods for low voltage energy cables
122 EN 50396, Non electrical test methods for low voltage energy cables
123 EN 60228, Conductors of insulated cables (IEC 60228)
124 HD 60364-5-52:2011, Low-voltage electrical installations - Part 5-52: Selection and erection of electrical
125 equipment - Wiring systems (IEC 60364 5 52:2009)
126 EN 60754-2, Test on gases evolved during combustion of materials from cables - Part 2: Determination of
127 acidity (by pH measurement) and conductivity (IEC 60754-2)
prHD 604 S2:2021 (E)
Part 1
128 EN 60811 (series), Insulating and sheathing materials of electric and optical cables – Common test methods
129 (IEC 60811 series)
130 IEC 60096-1, Radio-frequency cables - Part 1: General requirements and measuring methods
131 IEC 60287 series, Electric cables
132 IEC 60502-1:2021, Power cables with extruded insulation and their accessories for rated voltages from 1 kV
133 (U = 1,2 kV) up to 30 kV (U = 36 kV) - Part 1: Cables for rated voltages of 1 kV (U = 1,2 kV) and 3 kV
m m m
134 (U = 3,6 kV)
m
135 3 Terms and definitions
136 For the purposes of this document, the following terms and definitions apply.
137 ISO and IEC maintain terminological databases for use in standardization at the following addresses:
138 — ISO Online browsing platform: available at https://www.iso.org/obp
139 — IEC Electropedia: available at http://www.electropedia.org/
140 3.1 Definitions relating to insulating and sheathing compounds
141 3.1.1
142 insulating and sheathing compounds
143 types of insulating and sheathing compounds covered in this document are listed in Table 1, together with
144 their abbreviated designations
145 Table 1 — Insulating and sheathing compounds
Insulating and sheathing compounds See
Insulating Thermoplastic
- Polyvinylchloride (PVC) Table 2
- Thermoplastic Non-halogenated compound  Table 3
Cross-linked
- Cross-linked Polyethylene (XLPE) Table 4
- Ethylene propylene rubber (EPR) Table 5
- Hard Ethylene propylene rubber (HEPR) Table 6
- Silicone rubber  Table 7
- Crosslinked Non-halogenated compound  Table 8
Sheathing Thermoplastic
- Polyvinylchloride (PVC) Table 9
- Thermoplastic Non-halogenated compound  Table 10
Cross-linked
- Crosslinked Non-halogenated compound  Table 11
146 3.1.2
147 type of compound
148 category in which a compound is placed according to its properties, and which is determined by specific
149 tests; the type designation is not directly related to the composition of the compound
prHD 604 S2:2021 (E)
Part 1
150 3.2 Definitions relating to the tests
151 3.2.1
152 type test
153 T
154 tests required to be made before supplying a type of cable covered by this document on a general
155 commercial basis in order to demonstrate satisfactory performance characteristics to meet their intended
156 application and which are of such a nature that, after they have been made, they need not be repeated
157 unless changes are made in the cable material, design or type of manufacturing process which might change
158 the performance characteristics
159 3.2.2
160 sample test
161 S
162 tests made on selected lengths of completed cable, on samples of completed cable, or components taken
163 from a completed cable adequate to verify that the finished product meets the design specifications
164 Note 1 to entry: Tests classified as Sample (S) or Routine (R) could be required as part of any Type Approval
165 Schemes.
166 3.2.3
167 routine test
168 R
169 tests made on all production cable lengths to demonstrate their integrity
170 Note 1 to entry: Tests classified as Sample (S) or Routine (R) could be required as part of any Type Approval
171 Schemes.
172 3.2.4
173 test after installation
174 tests intended to demonstrate the integrity of the cable and its accessories as installed
175 3.3
176 rated voltage
177 reference voltage for which the cable is designed, and which serves to define the electrical tests and which
178 is expressed by the combination of the following values U /U (U ) expressed in kV:
o m
179 — U is the r.m.s value between any insulated conductor and earth (metallic covering of the cable or the
o
180 surrounding medium); U = 0,6 kV;
o
181 — U is the r.m.s. value between any two phase -conductors of a multicore cable or of a system of single-
182 core cables; U = 1,0 kV;
183 — U is the maximum r.m.s. value of the highest system voltage for which the equipment may be used;
m
184 U = 1,2 kV.
m
185 Note 1 to entry: In an alternating current system, the rated voltage of a cable shall be at least equal to the nominal
186 voltage of the system for which it is intended.
187 Note 2 to entry: If used in d.c. systems, the 0,6/1,0 kV cables of this document shall have a maximum DC voltage:
188 — Conductor to conductor 1,8 kV
189 — Conductor to earth 0,9 kV.
prHD 604 S2:2021 (E)
Part 1
190 4 Marking
191 4.1 Indication of origin
192 4.1.1 General
193 Cables shall be provided with an identification of origin consisting of:
194 1. Either the manufacturer's identification thread, or
195 2. The continuous marking of the manufacturer's name or trademark, or (if legally protected) identification
196 number
197 by one of the three following methods:
198 a) printed tape within the cable;
199 b) printing in a contrasting colour on the insulation of at least one core;
200 c) printing, indenting or embossing on the outer surface of the cable.
201 4.1.2 Continuity of marks
202 Unless otherwise specified in the particular section, each specified mark shall be regarded as continuous if
203 the distance between the end of the mark and the beginning of the next identical mark does not exceed:
204 550 mm if the marking is on the outer surface of the cable.
205 275 mm if the marking is
206 i) on the insulation of a sheathed cable
207 ii) on a tape within a sheathed cable
208 NOTE A “Specified Mark” is any mandatory mark covered by this section or by the particular requirements of
209 Clause 4 onwards of this document.
210 Figure 1 shows an example of the marking as used on the outer surface of the cable, where the word
211 “ORIGIN” is for the mandatory information required for 4.1, and “XYZ” is one of any other mandatory marks.
212 Figure 1 — Example of marking
213 4.2 Additional marking
214 Additional marking requirements could be specified in the particular sections.
prHD 604 S2:2021 (E)
Part 1
215 4.3 Durability
216 Printed markings shall be durable. Compliance with this requirement shall be checked by the test given in
217 HD 605 S3:2019, 2.5.4.
218 The printed legend shall be legible after carrying out the test.
219 4.4 Legibility
220 All markings shall be legible. Printed markings shall be in contrasting colours.
221 All colours of the identification thread shall be easy to recognize or easily be made recognizable, if
222 necessary, by cleaning with a suitable solvent.
223 4.5 Common marking
224 Under consideration.
225 4.6 Use of the name CENELEC
226 The name CENELEC, in full or abbreviated, shall not be directly marked on, or in, the cables.
227 5 Core identification
228 The cores shall be identified by colours or numbers when specified in the particular sections. Colouring shall
229 be achieved by the use of coloured insulation or by a coloured surface.
230 If the core identification is by colours it shall comply with HD 308 S2, unless otherwise specified in the
231 particular sections.
232 When identification is by numbers, they shall be printed in a colour which contrasts with the core colours.
233 Marking shall comply with EN 50334 unless otherwise specified.
234 The colours shall be clearly identifiable and durable. Durability shall be checked by the test given in
235 HD 605 S3:2019, 2.5.4.
236 Compliance with these requirements shall be verified by visual examination.
237 6 General requirements for the construction of cables
238 6.1 Conductors
239 6.1.1 Material
240 Conductors shall be either plain or metal-coated annealed copper or plain aluminium in accordance with
241 EN 60228, and with particular requirements in particular sections.
242 6.1.2 Construction
243 The maximum diameters of the wires of flexible conductors, and the minimum number of the wires of rigid
244 conductors, shall be in accordance with EN 60228, unless otherwise specified in the particular sections.
245 The classes of the conductors relevant to the various types of cables are given in the particular sections.
246 Conductors shall be either circular or sector in shape, and of solid metal or stranded.
247 6.1.3 Check of construction
248 Compliance with the requirements of 6.1.1 and 6.1.2 including the requirements of EN 60228, shall be
249 checked by inspection and by measurement.
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250 6.1.4 Electrical resistance
251 The resistance of each conductor at 20 °C shall be in accordance with the requirements of EN 60228 for the
252 given class of conductor.
253 Compliance shall be checked by the test given in HD 605 S3:2019, 3.1.1.
254 6.1.5 Separator layer
255 A separator layer may be placed between the conductor and insulation. Unless otherwise specified, it shall
256 be non-hygroscopic.
257 It shall be easily removable from the conductor.
258 6.2 Insulation
259 6.2.1 Material
260 The insulation shall be an extruded solid compound of one of the types listed in 3.1.1 and as specified for
261 each type of cable in the particular sections of this document.
262 The test requirements for the insulating compounds are specified in Tables 2 to 8 and the reference to the
263 test methods are specified in the particular sections.
264 The maximum conductor temperature in normal operation and the short-circuit temperature for each
265 insulation are specified in the particular sections.
266 6.2.2 Application
267 The insulation may consist of one or more bonded layers. It shall be so applied that it fits closely on the
268 conductor or over the separator tape, and it shall be possible to remove it without damage to the insulation
269 itself, to the conductor or to the metal coating if any. If required, compliance shall be checked by inspection
270 and by manual test. The insulation shall be applied by a suitable extrusion process, cross-linked where
271 required, and shall form a compact and homogeneous body.
272 6.2.3 Thickness
273 The mean value of the thickness of insulation shall not be less than the specified value for each type and
274 size of cable shown in the tables of the particular sections.
275 However, the thickness at any point may be less than the specified value provided that the difference does
276 not exceed 0,1 mm + 10 % of the specified value.
277 Compliance shall be checked by the test given in HD 605 S3:2019, 2.1.1.
278 6.3 Assembly of cores
279 In multicore cables, the cores shall be cabled helically or with another suitable method.
280 Auxiliary cores, if any, shall be laid up in the interstices between main cores. Allowed number and
281 requirements thereof are specified in the particular sections.
282 6.4 Fillers and tapes
283 6.4.1 General
284 For each type of cable, the particular sections specify whether that cable includes fillers or tapes or whether
285 the sheath or inner covering may penetrate between the cores, thus forming a filling.
286 Tapes may be applied as separators over the insulation of an individual core or as a binder over the core
287 assembly.
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288 6.4.2 Material
289 The fillers and tapes, if any, shall be composed of a suitable material.
290 When fillers or tapes are employed, there shall be no harmful interactions between their constituents and the
291 insulation and/or the sheath.
292 Compliance with this requirement shall be checked by the test specified in the particular section.
293 6.4.3 Application
294 Where fillers are used these may be applied either separately or as part of the inner covering or the inner
295 sheath to form a compact and reasonably circular cable. It shall be possible to strip the fillers, if any, from the
296 cable without damaging the insulation of cores.
297 6.5 Inner covering (bedding)
298 6.5.1 General
299 The inner covering, if any, may be extruded or lapped or a combination of the two.
300 6.5.2 Material
301 The material used for inner coverings shall be suitable for use at the maximum conductor temperature of the
302 cable in normal operation, and compatible with the cable components with which it is in contact.
303 Compliance with this requirement shall be checked by the test specified in the particular section.
304 6.5.3 Application
305 The extruded inner covering shall surround the core assembly completely and may penetrate the spaces
306 between them, giving the assembly a reasonably circular shape. The extruded inner covering shall be easily
307 separable from the cores.
308 Lapped beddings shall consist of one or more layers of tape covering the entire outer surface of the core
309 assembly.
310 For each type of cable, the particular sections indicate whether that cable includes an extruded inner
311 covering or a lapped bedding or a combination of these.
312 6.5.4 Thickness
313 Unless otherwise stated in the particular sections no measurement is required for the extruded or lapped
314 inner covering.
315 6.6 Inner sheath
316 6.6.1 General
317 An inner sheath may be specified in the particular sections.
318 6.6.2 Material
319 The material used for the extruded inner sheath shall be suitable for use at the maximum conductor
320 temperature of the cable in normal operation, and compatible with the cable components with which it is in
321 contact.
322 The requirements and references to the test methods are specified in the particular sections.
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323 6.6.3 Application
324 The inner sheath shall be extruded in a single layer. The sheath may be applied over an inner covering, or
325 directly over the core assembly. The sheath shall not adhere to the cores.
326 6.6.4 Thickness
327 The thickness of the extruded inner sheath shall be as specified in the particular sections.
328 6.7 Metallic coverings
329 6.7.1 Type of metallic layers
330 The following types of metallic layers may be specified in particular sections:
331 a) metallic screen
332 b) concentric conductor
333 c) metallic armour
334 d) a combination of the above
335 Detailed constructions of metallic coverings, together with test methods and requirements, are specified in
336 the particular sections.
337 6.7.2 Application
338 The metallic layers may be applied over an inner covering or inner sheath, as specified in the particular
339 sections.
340 6.8 Oversheath
341 6.8.1 Material
342 The oversheath shall be a compound of one of the types listed in 3.1.1 and as specified for each type of
343 cable in the particular section.
344 The test requirements and the references to test methods for these compounds are specified in the particular
345 sections.
346 6.8.2 Application
347 The oversheath shall be extruded and may consist of one or more layers.
348 For unarmoured cables the sheath shall not adhere to the cores.
349 A separator, consisting of a film or tape, may be placed under the oversheath.
350 6.8.3 Thickness
351 6.8.3.1 General
352 Unless otherwise specified in the particular section the following requirements shall apply.
353 6.8.3.2 Sheath applied over smooth surface
354 For a sheath applied on a smooth cylindrical surface, such as an inner covering, a metal sheath or the
355 insulation of a single core, the mean value of the thickness of the oversheath shall not be less than the
356 specified value for each type and size of cable shown in the tables of the particular section.
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357 However, the thickness at any point may be less than the specified value provided that the difference does
358 not exceed 0,1 mm + 15 % of the specified value.
359 Test methods are specified in HD 605 S3:2019, 2.1.2.
360 6.8.3.3 Sheath applied over uneven surface
361 For a sheath applied on an irregular cylindrical surface, such as a penetrating sheath on an unarmoured
362 cable without inner covering or a sheath applied directly over armour, metallic screen or concentric
363 conductor, the smallest thickness at any point of the oversheath shall not fall below the value given in the
364 appropriate particular sections by more than 0,2 mm + 20 % of the specified value.
365 Test methods are specified in HD 605 S3:2019, 2.1.2.
366 6.9 Non-metallic components of halogen free cables
367 All non-metallic components shall be halogen free. This shall be checked by one of the tests specified in
368 EN 60754-2 unless otherwise specified in the particular section.
369 7 Tests on complete cables
370 All cables shall comply with the requirements given in the particular sections.
371 8 Sealing and packing
372 Prior to storage or shipment, cable ends shall be sealed by appropriate caps, hot dipping or other suitable
373 method so that water ingress is efficiently prevented. Cables shall be packed as coils or on drums according
374 to the particular sections.
375 9 Current carrying capacity
376 The current that cables to this document can carry is determined by different conditions, either electrical
377 (voltage drop) or thermal, whichever is most demanding.
378 The current carrying capacity resulting from thermal limitations are calculated according to IEC 60287 series.
379 These calculations shall take into account the actual network parameters and installation conditions.
380 Tabulated current carrying capacity values according to the cable type for typical installation conditions are
381 found in particular sections.
382 10 Guide to use and selection of cables
383 General requirements for use and selection of cables are given in HD 60364-5-52:2011
384 For guidance on the use of cables see Annex A in this section and the particular sections of this document.
385 NOTE When selecting cables, attention is drawn to the fact that national conditions or regulations covering, e.g.
386 climatic conditions or installation requirements, could exist.
387 11 Construction Products Regulation (CPR)
388 NOTE Cables following this document could be subject to the Construction Products Regulation.
389 Where the cable’s intended use is for permanent installations and general applications in constructions and
390 civil engineering works in the EU, then the performance requirements shall only be those of EN 13501-6 for
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391 relevant properties. EN 50575 explains the fire behaviour and testing methods. The recommended minimum
392 requirements, relative to the cable type, are explained in the particular sections of this document.
393 In case of installations not covered by CPR, different test other than those stated in EN 50575 could be
394 specified.
395 12 Low Voltage Directive (LVD)
396 NOTE Cables following this document are expected to follow the requirements of the LVD as detailed in Annex ZZ
397 in this part.
398 13 Requirements of insulating and sheathing compounds
399 The requirements of the insulating and sheathing compounds are covered in Tables 2 to 11.
400 Table 2 — Requirements of insulating compounds: PVC
1 2 3 4 5
Compound No Unit TIV 1 TIV 2 TIV 3
PVC PVC
Type  PVC insulation
insulation insulation
Maximum Operating Temperature of the
°C 70 70 70
Conductor
Mechanical Properties
- before ageing on sample
minimum tensile strength MPa 12,5 15 12,5
minimum elongation at break % 125 125 150
- after ageing on sample
temperature °C 80 100 100
duration T1 h 168 240 168
minimum tensile strength MPa 12,5 15 12,5
maximum variation T1/T0 % ±20 ±20 ±25
minimum elongation at break % 125 125 150
maximum variation T1/T0 % ±20 ±20 ±25
- after ageing on complete cable
(non-contamination test)
temperature °C 80 80 80
duration T1 h 168 168 168
minimum tensile strength MPa 12,5 12,5 12,5-
maximum variation T1/T0 % ±20 ±20 ±25
minimum elongation at break % 125 125 150
maximum variation T1/T0 % ±20 ±20 ±25
Physical and chemical properties
- loss of mass
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1 2 3 4 5
Compound No Unit TIV 1 TIV 2 TIV 3
PVC PVC
Type  PVC insulation
insulation insulation
Maximum Operating Temperature of the
°C 70 70 70
Conductor
duration h 168 - 168
temperature °C 80 - 80
maximum loss of mass % 2 - 2
- pressure test at high temperature
duration h - a a
temperature °C - 90 80
Coefficient k  - a a
Maximum depth of indentation  - 50 50
- heat shock test
duration h - 1 1
temperature °C - 150 150
mechanical stress - 20 -
N/cm
Mechanical Properties
- water absorption
temperature °C - 80 70
duration h - 168 240
mg/cm
a) maximum variation of mass - 5
b) with DC voltage: no breakdown V - - OK
Physical and chemical properties
- tests at low temperature
- elongation test at low temperature
temperature °C - −15 −20
minimum elongation % - 20 20
impact test at low temp. on complete

cable
temperature °C - - −20
bending test at low temperature,

before ageing
temperature °C −25 −15 −20
bending test at low temperature, after

aging
temperature °C −15
insulation resistance (min. value)
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1 2 3 4 5
Compound No Unit TIV 1 TIV 2 TIV 3
PVC PVC
Type  PVC insulation
insulation insulation
Maximum Operating Temperature of the
°C 70 70 70
Conductor
volume resistivity at 20°C  - - -
at 60°C Ω.cm - - -
a -
at 70°C Ω.cm 10 exp 10
- - -
at 90°C Ω.cm
Insulation constant Ki
- -
at 20°C MΩ.km 750
at 70°C MΩ.km - 0,3 -
NOTE   1 MPa = 1 N/mm2
a
See values in relevant part of this document.
401 Table 3 — Requirements of insulating compounds: Thermoplastic non-halogenated
1 2 3 4 5 6 7
Compound No Unit TIZ 1 TIZ 2 TIZ 3 TIZ 4 TIZ 5
non- non- non- non- non-
TYPE  haloge halogenate halogenate halogenat halogenat
nated d d ed ed
Maximum Operating Temperature
°C 70 90 70 90 70
of the Conductor
Mechanical Properties
- before ageing on sample
minimum tensile strength MPa 10 6,5 6,5 5,0 10
minimum elongation at break % 100 125 125 125 120
- after ageing on sample
temperature °C 100 110 90 135 100
duration T1 h 168 168 168 168 168
minimum tensile strength
MPa 5 6,5 6,5 5
maximum variation T1/T0 % ±30 −30 −30 −30 ±30
minimum elongation at break
% 100 100 100 100
maximum variation T1/T0 % ±30 ±40 ±40 ±30 ±40
- after ageing on complete cable

(non-contamination test)
temperature °C 100 100 80 100 100
duration T1 h 168 168 168 168 168
minimum tensile strength
MPa 5 6,5 6,5 5
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1 2 3 4 5 6 7
Compound No Unit TIZ 1 TIZ 2 TIZ 3 TIZ 4 TIZ 5
non- non- non- non- non-
TYPE  haloge halogenate halogenate halogenat halogenat
nated d d ed ed
Maximum Operating Temperature
°C 70 90 70 90 70
of the Conductor
maximum variation T1/T0 % ±30 −30 −30 −30 ±30
minimum elongation at break % 100 100 100 100
maximum variation T1/T0 % ±30 ±40 ±40 ±30 ±30
- after ageing on copper
conductor
temperature °C     100
duration T1 h     168
minimum tensile strength MPa
maximum variation T1/T0 %     ±30
minimum elongation at break %
maximum variation T1/T0 %     ±40
- after ageing on copper
conductor
(for cable with an overall diameter

up to and including 12,5 mm)
temperature °C     100
duration T1 h     168
Bending test -     No cracks
Physical
...